From 788ac5f41da5876a0f8d3600949677b31a1af424 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Wed, 21 Aug 2013 12:29:28 +0200
Subject: [PATCH 1/2] Add ol.source.Source#dispatchChangeEvent

---
 src/ol/source/source.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/ol/source/source.js b/src/ol/source/source.js
index 6d52d6616b..7d1cf9bc43 100644
--- a/src/ol/source/source.js
+++ b/src/ol/source/source.js
@@ -49,6 +49,14 @@ ol.source.Source = function(options) {
 goog.inherits(ol.source.Source, goog.events.EventTarget);
 
 
+/**
+ * @protected
+ */
+ol.source.Source.prototype.dispatchChangeEvent = function() {
+  this.dispatchEvent(goog.events.EventType.CHANGE);
+};
+
+
 /**
  * @protected
  */

From 0170c426ee19e0800506156905c85010b8197142 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Wed, 21 Aug 2013 12:29:49 +0200
Subject: [PATCH 2/2] Propagate change events from sources via layers

---
 src/ol/layer/layer.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/ol/layer/layer.js b/src/ol/layer/layer.js
index 2e331ff189..98a3b027a8 100644
--- a/src/ol/layer/layer.js
+++ b/src/ol/layer/layer.js
@@ -28,6 +28,9 @@ ol.layer.Layer = function(options) {
    */
   this.source_ = options.source;
 
+  goog.events.listen(this.source_, goog.events.EventType.CHANGE,
+      this.handleSourceChange_, false, this);
+
   if (!this.source_.isReady()) {
     goog.events.listenOnce(this.source_, goog.events.EventType.LOAD,
         this.handleSourceLoad_, false, this);
@@ -78,6 +81,14 @@ ol.layer.Layer.prototype.getSource = function() {
 };
 
 
+/**
+ * @private
+ */
+ol.layer.Layer.prototype.handleSourceChange_ = function() {
+  this.dispatchChangeEvent();
+};
+
+
 /**
  * @private
  */